Restrict QUIC session pool when channel ID is present.

net/quic/quic_client_session.h

Index: net/quic/quic_client_session.h
diff --git a/net/quic/quic_client_session.h b/net/quic/quic_client_session.h
index 7fbe3db5cd1871dbfcff24fb8076bb03e4f5090b..b46c0ab6d8185474ba98fd8d7f8a5e4c406d53e6 100644
--- a/net/quic/quic_client_session.h
+++ b/net/quic/quic_client_session.h
@@ -87,8 +87,8 @@ class NET_EXPORT_PRIVATE QuicClientSession : public QuicClientSessionBase {
     DISALLOW_COPY_AND_ASSIGN(StreamRequest);
   };
 
-  // Constructs a new session which will own |connection| and |helper|, but
-  // not |stream_factory|, which must outlive this session.
+  // Constructs a new session connected to |server_id| which will own
+  // |connection|, but not |stream_factory|, which must outlive this session.
   // TODO(rch): decouple the factory from the session via a Delegate interface.
   QuicClientSession(QuicConnection* connection,
                     scoped_ptr<DatagramClientSocket> socket,
@@ -219,6 +219,7 @@ class NET_EXPORT_PRIVATE QuicClientSession : public QuicClientSessionBase {
 
   void OnConnectTimeout();
 
+  const HostPortPair server_host_port_;
   bool require_confirmation_;
   scoped_ptr<QuicCryptoClientStream> crypto_stream_;
   QuicStreamFactory* stream_factory_;